Description

There are lots of so-called aero socks out there. But the Castelli Fast Feet 4 Sock has the development and testing to back up the claim. The few socks that have been tested have probably been tested with a static, nonmoving test because it´s easier. But a foot is always in motion, so we created a jig that replicates the movement of the lower leg. And we tested it on actual riders to verify the results. This sock can save 2 watts at 50 km/h. The newest version has an updated cuff fit for more comfort and aerodynamic gains.
Features:
– Castelli´s Fast Feet project — for maximum aerodynamics
– Foot portion based on Castelli Rosso Corsa Sock for in-shoe comfort
– Polyurethane grip strip at top to keep sock in place
– Leg portion constructed with engineered grooved Lycra® to help detach airflow
Specifications:
– Weight: 53 g
– Fit: Race
Technology:
Rosso Corsa:
– Our Rosso Corsa label is only applied to the highest-level products we make. Every thread and fiber, every curve and contour is obsessed about. Rosso Corsa represents a categorical breakthrough in cycling innovation and the meticulous craftsmanship you expect from Castelli’s performance-enhancing apparel.
Pro Riders:
– Garment supplied to the Soudal Quick-Step Team riders. White